Fastening sleeve for band strapping



July 28, 1953 A. LATZ 2646,603

' FASTENING SLEEVE FOR BAND STRAPPING Filed June 28, 1950 TOP WALL OF CHANNEL m Fag r seams 16 DEVICE BOTTOM WALL 0F 16 F" Ee sEJe-E vao r g wnn C 9 SJESBERS ii 1 ii IN VE/Y TOR V/ZZ mI fZ- Patented July 28, 1953 FASTENING SLEEVE FOR BAND STRAPPING Anton Latz, Koln-Hohenberg, Germany Application June 28, 1950, Serial No. 170,749 In Germany July 20, 1949 1 Claim.

With steel band strappings for packed articles of any kind, fastening is generally effected by a sleeve which encloses the overlapping ends of the band or strip. The pull-resisting fastening is achieved by mutual deformation of the sleeve and the ends of the band.

When a so-called closed sleeve is employed, this is first of all slipped over the steel band, whereupon, the free end of the band is passed around the package and then also passes through the same sleeve. The common deformation of band and sleeve is effected in a sealing device.

The object of the present invention is to simplify the slipping over of the sleeve or the guiding of the free end of the band into the sleeve. This is of particular importance, because packing operations are frequently carried out in restricted spaces and under bad light and, in addition, because the sleeve is to enclose the ends of the steel band as tightl as possible.

According to this invention, the introduction of the end of the band into the sleeve is facilitated because the latter is expanded on its flat upper side and/or its lower side at one or both ends. The end edges of the sleeves which are bent down may at the same time serve as the guide when pushed laterally into the sealing device.

Some embodiments of the invention are illustrated, by way of example, in the drawing, wherein:

Fig. 1 shows the fastening of a steel band strapping in the completed condition and. includes a broken line showing of a sealing device providing guide grooves;

Fig. 2 is a side elevation of the fastening sleeve before the stamping thereof;

Fig. 3 is an end elevation of the sleeve alone;

Fig. 4 shows another form of the fastening sleeve in longitudinal section, on the line 4-4 in Fig. 5 and combined with a sealing device;

Fig. 5 is a corresponding end view of the sleeve alone;

Fig. 6 is yet another form of the sleeve, also in longitudinal section on the line 6-6 in Fig. 7; and

Fig. 7 is a corresponding end view.

Referring to Fig. 1, the two ends la and lnb of the annularly-closed steel band I0, which is wound around a package, all fastened by a sleeve II by the margins of the latter, those portions of the ends Illa and lllb of the steel band which extend into the sleeve I I being provided with tongue-like cuts l2 which are bent downwardly out of the plane of the sleeve 1 I. The upper surface of the sleeve is rounded at its open end edges groove of the sealing device.

Ha, such rounding preferably being arcuately about its centre point. In this way, the insertion of the sleeve I I into the guide groove of the sealing device (shown by dotted lines [4 in Fig. 1) is greatly facilitated and binding is prevented. It is impossible for the sleeve to become jammed between the walls Id of the guide groove, both when the walls of the grooves I4 extend at right angles to the longitudinal direction of the band In or at an angle thereto. a

If, with this construction, the upper part of the steel band is indented from above by a straight stamping knife at the point l5, then that portion of the steel band lying therebeneath can everywhere yield resiliently downwards except where the projecting lower edge of the sleeve serves as a firm support up to a certain degree. If the lower layer of the band l0 should be lightly scored thereby over a short distance, this cannot have a harmful effect on the complete security of the strapping, since the weakest transverse section is always to be looked for within the sleeve, where the marginal cuts l2 are disposed.

If the sleeve II is initially manufactured as shown in Figs. '2 and 3 of the drawing, in which it is expanded in trumpet-fashion on its fiat sides by bending up and bending down the free longitudinal edges I lb and I I0, respectively, this great- 1y facilitates the introduction of the free end of the band into the sleeve. This advantage is produced independently of whether the ends Ila of the sleeve are arcuate, as shown in Figs. 1 and 2 of the drawing, or whether they are made with straight edges, which has been customary in the past. The expansion at only one end is sufficient in certain cases. However, if the sleeve is made symmetrical by expanding both open ends, the advantage is obtained that the band I0 can be introduced into the sleeve II from either side at will.

With the trumpet-like expansion of the sleeve II as shown in Figs. 2 and 3 of the drawing, the walls of guide groove of the sealing device for the upper and lower edges l lb and I la in the vertical direction can accordingly be arranged further away from one another than hitherto. It is clear that this greatly facilitaes the introduction of the steel band with the sleeve into the guide If the sleeve is guided with the bent-up end edges of its upper side and if these bent-up portions are pressed flat over their whole extent in the deformation of the sleeve which follows, then any guiding action into the sealing device ceases with the deformation, so that the lifting of the device from turned end edges [6a allow guiding of the sleevfi Hi When it is inserted laterally into the sealing device, the base plate of which: is, conveniently provided with suitably arranged guide grooves. In this manner, any deplacement of the sleeve during the tightening of the steel band is at the same time positively prevented. If the sealing device is so constructed that the angular portions 1611 still have the, same shape after the stamping or other deformation of the sleeve, then the pointed parts [0b are supported against the package and penetrate-superficially into the latter in; certain circumstances. In this way, it is made diilicult for the sleeve to be deformed responsive to stresses transmitted thereto by the strap. It is most important, however, that the steel band strapping should be prevented from slipping laterally because of the penetration of the points 10b.

In the sleeve structure shown in Figs. 6 and 7 the ends Hicextend at an angle of about 90 from the plane of the bottom wall. The sleeve is guided into the sealing device substantially in the same manner as the sleeve illustrated in Figs. 4 and 5' and similarly fulfills the other requirements already mentioned before.

It should be mentioned that the invention is not restricted to the deformation of the sleeve H' 0 t6 (and also of the ends of the band projectipg into the sleeve) by marginal cuts 52. Fastening can also be achieved by any other stamping, punching, welding or like operation without departing from the basic feature of the invention.

I claim:

A sleevelike strap seal adapted for mounting in guide means of a sealing device and for receiving the ends of a sealing strap extending about a package and for holding said strap ends in sealed position comprising sheet metal means forming a flat elongated tubular member having a side wall containing a longitudinal split, said tubu lar member being adapted to be operated on in the sealing device with the ends of said strap inserted therein to unite said seal with said strap ends, the opposite ends of said side wall of said tubular memberadjacent said split extending angularly outwardly away from the axis thereof for the twofold purpose of facilitating the insertion of said strap ends into said tubular memher and of facilitating insertion of said tubular member with said strap ends therein into guide means in said sealing device laterally thereof.

ANTON LATZ.

References Cited in the file of this patent UNITED, ST ES PATENTS Number Name Date 21,305 Agnew Aug. 31, 1358 137,510 Ramsay Apr. 8, 1873 150,096 Stafford Apr. 21, 1874 1,260,016 Norton Mar. 19, 1918 1,444,103 Boyd Feb. 6, 1923 1,835,005 Bosco Dec. 8, 1931 2,045,078 Graves, Jr, June 2, 1936 2,062,099 MacChesney Nov. 24, 19 36 FOREIGN PATENTS Number Country Date 626,623 Germany. Feb. 29, 1936 618,286 GreatBritain Feb. 18, 1949 

